The Arduino MEGA has 12 ports available for PWM generation. These ports can be used control motors and servos to extend the capabilities of your Arduino system. Users can use the "Motors and Sensor Setup" utility (found under the Robot menu) to configure their ports for the various types of motors:

+

The 328P-Based Arduinos have 6 ports available for PWM generation. These ports can be used control motors and servos to extend the capabilities of your Arduino system. Users can use the "Motors and Sensor Setup" utility (found under the Robot menu) to configure their ports for the various types of motors:

Latest revision as of 21:12, 11 May 2012

The 328P-Based Arduinos have 6 ports available for PWM generation. These ports can be used control motors and servos to extend the capabilities of your Arduino system. Users can use the "Motors and Sensor Setup" utility (found under the Robot menu) to configure their ports for the various types of motors:

Hardware Timing Servo Ports - Pin 9 and 10.

Hardware Timing PWM (H-Bridge Friendly) Ports - Pin 4, 5, 6, and 11.

Available Motor Types

Motor Type

Comments

No Servo/Motor

Generate no PWM from this pin.

Audio Speaker

Use this Pin to generate Audio output (piezo-electric speaker compatible)

Servo - Standard

Generate a 20ms-based Servo Pulse

Servo - Cont. Rotation

Generate a 20ms-based Continuous Rotation Servo Pulse

Ext-HBridge - Single PWM

Generates a standard PWM pulse and associates a second digital out pin to control the direction. Used for HBridges that have High/Low direction control.

Ext-HBridge - Dual PWM

Generates a standard PWM pulse on two pins for speed and direction control. Used for HBridges that have PWM based direction control.

Variable Intensity LED

Generates a standard PWM pulse on a single pin for brightness control of a LED.

Analog Write

Generates a standard PWM pulse on a single pin for analog output.

Contents

bMotorReflected

bool bMotorReflected

(bool) Boolean array with one entry for each motor. Indicates that the direction of a motor should be reflected 180 degrees. Useful when mechanical design results in a logical "reversed" condition of a motor.

motor

(int) An array variable with one element for each of the possible motors.

When used with a motor, this command is used to set the speed (-127 to +127) for a motor. Negative values are reverse; positive forward. Zero is stopped.

When used with a servo, this command is used to set the position (-127 to +127) of the servo. Zero is the "center" position of the servo, and -127 to +127 is the range of the servo. Note that your servo may not be able to travel the full -127 to +127 range, so please experiment with smaller values to avoid breaking your servo.